What are the different types of network security zones?

Network security zones separate systems based on their trust level to reduce exposure and limit unauthorized access.

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Common zones include the Trusted/Internal Network, DMZ (Demilitarized Zone), Public Zone, and Guest Zone. Highly sensitive systems reside in restricted segments, while public services like web servers stay in the DMZ. Clear segmentation prevents one compromised device from exposing the entire environment and improves control over traffic flow.

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Organizations use tiered zones such as Secure Core, Production, Partner, and External Networks. Each zone enforces different access rules. Firewalls and VLANs separate them to support least-privilege access. This structure reduces attack surfaces and enhances monitoring by isolating risky or externally facing resources.

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